asterisk users - Nov 2005 - What's the purpose of the "username=" line?

After some experimentation and posting, I have concluded
that in the file sip.conf, the line:

username = irrelevant

has no effect whatsoever on SIP registration.  Any entry on
the right hand side will make no difference, and the line can even
be avoided altogether (as the O'Reilly book example does).

The only effect of that line that have I found is to be displayed
under the output of the

host*CLI> sip show peers

command.

So, what is that line good for?

TIA,

-Ramon F Herrera

telephony@jonjay.com wrote:
> After some experimentation and posting, I have concluded
> that in the file sip.conf, the line:
> 
> username = irrelevant
> 
Please read sip.conf.sample in your distribution for updates on
configuration parameters.

The username parameter has nothing at all to do with a username for
registrations... It should be named "defaultuser" since it is used in
combination with "defaultip" to construct an URI to user if we want to
call a peer with "host=dynamic" before registration or when
registration
expired.

It is by far the most misunderstood parameter in sip.conf, but also a
hint that you should not guess, but read available documentation ;-)

/Olle